51730168320 has 640 divisors, whose sum is σ = 190067834880. Its totient is φ = 13330759680.

The previous prime is 51730168307. The next prime is 51730168333. The reversal of 51730168320 is 2386103715.

51730168320 is a `hidden beast` number, since 5 + 173 + 0 + 168 + 320 = 666.

It is an interprime number because it is at equal distance from previous prime (51730168307) and next prime (51730168333).

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 407324097 + ... + 407324223.

It is an arithmetic number, because the mean of its divisors is an integer number (296980992).

Almost surely, 2^51730168320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51730168320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95033917440).

51730168320 is an abundant number, since it is smaller than the sum of its proper divisors (138337666560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51730168320 is a wasteful number, since it uses less digits than its factorization.

51730168320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 51730168320 in words is "fifty-one billion, seven hundred thirty million, one hundred sixty-eight thousand, three hundred twenty".